| Achievement | How to unlock
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| - Defeat the boss of World 4.
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| - Find any hidden area within the game.
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| - Complete 20 levels in the game's challenge mode.
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| - Defeat the game's final boss.
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| - Defeat the boss of World 1.
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| - Survive 30 seconds with the "death wall" in level 1-11.
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- Gentleman, Scholar, Snake.
| - Defeat the boss of World 2.
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| - Obtain a gold star on any 10 levels.
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| - Complete a level without killing any enemies.
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| - Carry the first Spider Clam to the goal tape on level 3-11.
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- Now You're Playing With Power!
| - Defeat the boss of World 3.
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| - Obtain a gold star on any level.
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| - Collect all of the pixels in the game.
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| - Complete a level without ever entering the Realm of Code.
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